<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    

    <script>

        let week = prompt('请输入一个星期数')
        switch(week){
            case('星期一'):{
                document.write('Monday')
                break
            }
            case('星期二'):{
                document.write('Tuesday')
                break
            }
            case('星期三'):{
                document.write('Wednesday')
                break
            }
            case('星期四'):{
                document.write('Thursday')
                break
            }
            case('星期五'):{
                document.write('Friday')
                break
            }
            case('星期六'):{
                document.write('Saturday')
                break
            }
            case('星期天'):{
                document.write('Sunday')
                break
            }
            default:{
                document.write('输入错误')
            }
        }
    </script>
</body>
</html>